General corporate visual image systems, such as store signs, trademarks, badges and mascot logos commonly used in advertising and publicity, need highly consistent visual images, including patterns, characters and colors. Therefore, in the design of logo, it is necessary to accurately express the color, which is the meaning of logo standard color.

Although there are many colors that human beings can recognize (up to tens of thousands), there are only a few kinds of colors in language (about dozens), and there is a big gap in color recognition ability between people. Any color can be mixed by primary colors in different proportions, so the numerical expression of primary colors is introduced, such as RGB system and CMYK system. Accurately express a certain color by determining the proportion of primary colors.

There are also standard color cards (a group of color cards with numbers on them) used as the design basis and the standard for comparison inspection. There are also many standard color card systems, such as Pantone color card and Munsell color card.